利用Query Monitor插件调试WordPress并提高网站性能
network_step2 ( $errors = false )
network_step2：这个动作钩子在网络设置过程的第二步被触发。
打印网络安装过程的步骤2。
function network_step2( $errors = false ) {
global $wpdb, $is_nginx;
$hostname = get_clean_basedomain();
$slashed_home = trailingslashit( get_option( 'home' ) );
$base = parse_url( $slashed_home, PHP_URL_PATH );
$document_root_fix = str_replace( '\', '/', realpath( $_SERVER['DOCUMENT_ROOT'] ) );
$abspath_fix = str_replace( '\', '/', ABSPATH );
$home_path = 0 === strpos( $abspath_fix, $document_root_fix ) ? $document_root_fix . $base : get_home_path();
$wp_siteurl_subdir = preg_replace( '#^' . preg_quote( $home_path, '#' ) . '#', '', $abspath_fix );
$rewrite_base = ! empty( $wp_siteurl_subdir ) ? ltrim( trailingslashit( $wp_siteurl_subdir ), '/' ) : '';
$location_of_wp_config = $abspath_fix;
if ( ! file_exists( ABSPATH . 'wp-config.php' ) && file_exists( dirname( ABSPATH ) . '/wp-config.php' ) ) {
$location_of_wp_config = dirname( $abspath_fix );
}
$location_of_wp_config = trailingslashit( $location_of_wp_config );
// Wildcard DNS message.
if ( is_wp_error( $errors ) ) {
echo '<div class="error">' . $errors->get_error_message() . '</div>';
}
if ( $_POST ) {
if ( allow_subdomain_install() ) {
$subdomain_install = allow_subdirectory_install() ? ! empty( $_POST['subdomain_install'] ) : true;
} else {
$subdomain_install = false;
}
} else {
if ( is_multisite() ) {
$subdomain_install = is_subdomain_install();
?>
<p><?php _e( 'The original configuration steps are shown here for reference.' ); ?></p>
<?php
} else {
$subdomain_install = (bool) $wpdb->get_var( "SELECT meta_value FROM $wpdb->sitemeta WHERE site_id = 1 AND meta_key = 'subdomain_install'" );
?>
<div class="error"><p><strong><?php _e( 'Warning:' ); ?></strong> <?php _e( 'An existing WordPress network was detected.' ); ?></p></div>
<p><?php _e( 'Please complete the configuration steps. To create a new network, you will need to empty or remove the network database tables.' ); ?></p>
<?php
}
}
$subdir_match = $subdomain_install ? '' : '([_0-9a-zA-Z-]+/)?';
$subdir_replacement_01 = $subdomain_install ? '' : '$1';
$subdir_replacement_12 = $subdomain_install ? '$1' : '$2';
if ( $_POST || ! is_multisite() ) {
?>
<h3><?php esc_html_e( 'Enabling the Network' ); ?></h3>
<p><?php _e( 'Complete the following steps to enable the features for creating a network of sites.' ); ?></p>
<div class="notice notice-warning inline"><p>
<?php
if ( file_exists( $home_path . '.htaccess' ) ) {
echo '<strong>' . __( 'Caution:' ) . '</strong> ';
printf(
/* translators: 1: wp-config.php, 2: .htaccess */
__( 'You should back up your existing %1$s and %2$s files.' ),
'<code>wp-config.php</code>',
'<code>.htaccess</code>'
);
} elseif ( file_exists( $home_path . 'web.config' ) ) {
echo '<strong>' . __( 'Caution:' ) . '</strong> ';
printf(
/* translators: 1: wp-config.php, 2: web.config */
__( 'You should back up your existing %1$s and %2$s files.' ),
'<code>wp-config.php</code>',
'<code>web.config</code>'
);
} else {
echo '<strong>' . __( 'Caution:' ) . '</strong> ';
printf(
/* translators: %s: wp-config.php */
__( 'You should back up your existing %s file.' ),
'<code>wp-config.php</code>'
);
}
?>
</p></div>
<?php
}
?>
<ol>
<li><p id="network-wpconfig-rules-description">
<?php
printf(
/* translators: 1: wp-config.php, 2: Location of wp-config file, 3: Translated version of "That's all, stop editing! Happy publishing." */
__( 'Add the following to your %1$s file in %2$s <strong>above</strong> the line reading %3$s:' ),
'<code>wp-config.php</code>',
'<code>' . $location_of_wp_config . '</code>',
/*
* translators: This string should only be translated if wp-config-sample.php is localized.
* You can check the localized release package or
* https://i18n.svn.wordpress.org/<locale code>/branches/<wp version>/dist/wp-config-sample.php
*/
'<code>/* ' . __( 'That’s all, stop editing! Happy publishing.' ) . ' */</code>'
);
?>
</p>
<p class="configuration-rules-label"><label for="network-wpconfig-rules">
<?php
printf(
/* translators: %s: File name (wp-config.php, .htaccess or web.config). */
__( 'Network configuration rules for %s' ),
'<code>wp-config.php</code>'
);
?>
</label></p>
<textarea id="network-wpconfig-rules" class="code" readonly="readonly" cols="100" rows="7" aria-describedby="network-wpconfig-rules-description">
define( 'MULTISITE', true );
define( 'SUBDOMAIN_INSTALL', <?php echo $subdomain_install ? 'true' : 'false'; ?> );
define( 'DOMAIN_CURRENT_SITE', '<?php echo $hostname; ?>' );
define( 'PATH_CURRENT_SITE', '<?php echo $base; ?>' );
define( 'SITE_ID_CURRENT_SITE', 1 );
define( 'BLOG_ID_CURRENT_SITE', 1 );
</textarea>
<?php
$keys_salts = array(
'AUTH_KEY' => '',
'SECURE_AUTH_KEY' => '',
'LOGGED_IN_KEY' => '',
'NONCE_KEY' => '',
'AUTH_SALT' => '',
'SECURE_AUTH_SALT' => '',
'LOGGED_IN_SALT' => '',
'NONCE_SALT' => '',
);
foreach ( $keys_salts as $c => $v ) {
if ( defined( $c ) ) {
unset( $keys_salts[ $c ] );
}
}
if ( ! empty( $keys_salts ) ) {
$keys_salts_str = '';
$from_api = wp_remote_get( 'https://api.wordpress.org/secret-key/1.1/salt/' );
if ( is_wp_error( $from_api ) ) {
foreach ( $keys_salts as $c => $v ) {
$keys_salts_str .= "ndefine( '$c', '" . wp_generate_password( 64, true, true ) . "' );";
}
} else {
$from_api = explode( "n", wp_remote_retrieve_body( $from_api ) );
foreach ( $keys_salts as $c => $v ) {
$keys_salts_str .= "ndefine( '$c', '" . substr( array_shift( $from_api ), 28, 64 ) . "' );";
}
}
$num_keys_salts = count( $keys_salts );
?>
<p id="network-wpconfig-authentication-description">
<?php
if ( 1 === $num_keys_salts ) {
printf(
/* translators: %s: wp-config.php */
__( 'This unique authentication key is also missing from your %s file.' ),
'<code>wp-config.php</code>'
);
} else {
printf(
/* translators: %s: wp-config.php */
__( 'These unique authentication keys are also missing from your %s file.' ),
'<code>wp-config.php</code>'
);
}
?>
<?php _e( 'To make your installation more secure, you should also add:' ); ?>
</p>
<p class="configuration-rules-label"><label for="network-wpconfig-authentication"><?php _e( 'Network configuration authentication keys' ); ?></label></p>
<textarea id="network-wpconfig-authentication" class="code" readonly="readonly" cols="100" rows="<?php echo $num_keys_salts; ?>" aria-describedby="network-wpconfig-authentication-description"><?php echo esc_textarea( $keys_salts_str ); ?></textarea>
<?php
}
?>
</li>
<?php
if ( iis7_supports_permalinks() ) :
// IIS doesn't support RewriteBase, all your RewriteBase are belong to us.
$iis_subdir_match = ltrim( $base, '/' ) . $subdir_match;
$iis_rewrite_base = ltrim( $base, '/' ) . $rewrite_base;
$iis_subdir_replacement = $subdomain_install ? '' : '{R:1}';
$web_config_file = '<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.webServer>
<rewrite>
<rules>
<rule name="WordPress Rule 1" stopProcessing="true">
<match url="^index.php$" ignoreCase="false" />
<action type="None" />
</rule>';
if ( is_multisite() && get_site_option( 'ms_files_rewriting' ) ) {
$web_config_file .= '
<rule name="WordPress Rule for Files" stopProcessing="true">
<match url="^' . $iis_subdir_match . 'files/(.+)" ignoreCase="false" />
<action type="Rewrite" url="' . $iis_rewrite_base . WPINC . '/ms-files.php?file={R:1}" appendQueryString="false" />
</rule>';
}
$web_config_file .= '
<rule name="WordPress Rule 2" stopProcessing="true">
<match url="^' . $iis_subdir_match . 'wp-admin$" ignoreCase="false" />
<action type="Redirect" url="' . $iis_subdir_replacement . 'wp-admin/" redirectType="Permanent" />
</rule>
<rule name="WordPress Rule 3" stopProcessing="true">
<match url="^" ignoreCase="false" />
<conditions logicalGrouping="MatchAny">
<add input="{REQUEST_FILENAME}" matchType="IsFile" ignoreCase="false" />
<add input="{REQUEST_FILENAME}" matchType="IsDirectory" ignoreCase="false" />
</conditions>
<action type="None" />
</rule>
<rule name="WordPress Rule 4" stopProcessing="true">
<match url="^' . $iis_subdir_match . '(wp-(content|admin|includes).*)" ignoreCase="false" />
<action type="Rewrite" url="' . $iis_rewrite_base . '{R:1}" />
</rule>
<rule name="WordPress Rule 5" stopProcessing="true">
<match url="^' . $iis_subdir_match . '([_0-9a-zA-Z-]+/)?(.*.php)$" ignoreCase="false" />
<action type="Rewrite" url="' . $iis_rewrite_base . '{R:2}" />
</rule>
<rule name="WordPress Rule 6" stopProcessing="true">
<match url="." ignoreCase="false" />
<action type="Rewrite" url="index.php" />
</rule>
</rules>
</rewrite>
</system.webServer>
</configuration>
';
echo '<li><p id="network-webconfig-rules-description">';
printf(
/* translators: 1: File name (.htaccess or web.config), 2: File path. */
__( 'Add the following to your %1$s file in %2$s, <strong>replacing</strong> other WordPress rules:' ),
'<code>web.config</code>',
'<code>' . $home_path . '</code>'
);
echo '</p>';
if ( ! $subdomain_install && WP_CONTENT_DIR !== ABSPATH . 'wp-content' ) {
echo '<p><strong>' . __( 'Warning:' ) . ' ' . __( 'Subdirectory networks may not be fully compatible with custom wp-content directories.' ) . '</strong></p>';
}
?>
<p class="configuration-rules-label"><label for="network-webconfig-rules">
<?php
printf(
/* translators: %s: File name (wp-config.php, .htaccess or web.config). */
__( 'Network configuration rules for %s' ),
'<code>web.config</code>'
);
?>
</label></p>
<textarea id="network-webconfig-rules" class="code" readonly="readonly" cols="100" rows="20" aria-describedby="network-webconfig-rules-description"><?php echo esc_textarea( $web_config_file ); ?></textarea>
</li>
</ol>
<?php
elseif ( $is_nginx ) : // End iis7_supports_permalinks(). Link to Nginx documentation instead:
echo '<li><p>';
printf(
/* translators: %s: Documentation URL. */
__( 'It seems your network is running with Nginx web server. <a href="%s">Learn more about further configuration</a>.' ),
__( 'https://wordpress.org/support/article/nginx/' )
);
echo '</p></li>';
else : // End $is_nginx. Construct an .htaccess file instead:
$ms_files_rewriting = '';
if ( is_multisite() && get_site_option( 'ms_files_rewriting' ) ) {
$ms_files_rewriting = "n# uploaded filesnRewriteRule ^";
$ms_files_rewriting .= $subdir_match . "files/(.+) {$rewrite_base}" . WPINC . "/ms-files.php?file={$subdir_replacement_12} [L]" . "n";
}
$htaccess_file = <<<EOF
RewriteEngine On
RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]
RewriteBase {$base}
RewriteRule ^index.php$ - [L]
{$ms_files_rewriting}
# add a trailing slash to /wp-admin
RewriteRule ^{$subdir_match}wp-admin$ {$subdir_replacement_01}wp-admin/ [R=301,L]
RewriteCond %{REQUEST_FILENAME} -f [OR]
RewriteCond %{REQUEST_FILENAME} -d
RewriteRule ^ - [L]
RewriteRule ^{$subdir_match}(wp-(content|admin|includes).*) {$rewrite_base}{$subdir_replacement_12} [L]
RewriteRule ^{$subdir_match}(.*.php)$ {$rewrite_base}$subdir_replacement_12 [L]
RewriteRule . index.php [L]
EOF;
echo '<li><p id="network-htaccess-rules-description">';
printf(
/* translators: 1: File name (.htaccess or web.config), 2: File path. */
__( 'Add the following to your %1$s file in %2$s, <strong>replacing</strong> other WordPress rules:' ),
'<code>.htaccess</code>',
'<code>' . $home_path . '</code>'
);
echo '</p>';
if ( ! $subdomain_install && WP_CONTENT_DIR !== ABSPATH . 'wp-content' ) {
echo '<p><strong>' . __( 'Warning:' ) . ' ' . __( 'Subdirectory networks may not be fully compatible with custom wp-content directories.' ) . '</strong></p>';
}
?>
<p class="configuration-rules-label"><label for="network-htaccess-rules">
<?php
printf(
/* translators: %s: File name (wp-config.php, .htaccess or web.config). */
__( 'Network configuration rules for %s' ),
'<code>.htaccess</code>'
);
?>
</label></p>
<textarea id="network-htaccess-rules" class="code" readonly="readonly" cols="100" rows="<?php echo substr_count( $htaccess_file, "n" ) + 1; ?>" aria-describedby="network-htaccess-rules-description"><?php echo esc_textarea( $htaccess_file ); ?></textarea>
</li>
</ol>
<?php
endif; // End IIS/Nginx/Apache code branches.
if ( ! is_multisite() ) {
?>
<p><?php _e( 'Once you complete these steps, your network is enabled and configured. You will have to log in again.' ); ?> <a href="<?php echo esc_url( wp_login_url() ); ?>"><?php _e( 'Log In' ); ?></a></p>
<?php
}
}
要使用` get_users `函数获取所有用户列表，可以按照以下步骤进行：
1. 使用` get_users `函数调用获取用户列表：
$users = get_users();
2. 您可以按需使用参数来过滤结果。例如，您可以通过角色、用户ID、用户登录名等过滤用户列表。以下是一个根据用户角色为过滤条件的示例：
$users = get_users( array(
'role' => 'subscriber' // 将角色名称替换为您要过滤的角色
) );
在上述示例中，将` role `参数设置为所需的角色名称来过滤用户列表。
3. 您可以使用循环遍历获取的用户列表，并访问每个用户的属性。例如，以下示例将显示每个用户的用户名和电子邮件地址：
foreach( $users as $user ) {
echo '用户名：' . $user->user_login . ', 电子邮件：' . $user->user_email . ;
}
在上述示例中，通过` $user->user_login `和` $user->user_email `访问每个用户的用户名和电子邮件地址。
请注意，` get_users `函数默认返回所有用户，并可以根据需要使用更多参数进行过滤。您可以参阅WordPress官方文档中的` get_users `函数文档，了解更多可用参数和用法示例。
总结起来，使用` get_users `函数获取所有用户列表的步骤是：
get_users `函数获取用户列表。在WordPress中，可以使用WP_PLUGIN_DIR和WP_PLUGIN_URL常量来定义插件的目录路径和URL。
1. `WP_PLUGIN_DIR`：这是一个常量，用于定义插件的目录路径（文件系统路径）。您可以使用以下代码在插件文件中访问该常量：
$plugin_dir = WP_PLUGIN_DIR . '/your-plugin-folder/';
在上述代码中，将"your-plugin-folder"替换为您插件的实际文件夹名称。使用该常量，您可以获取插件文件的完整路径。
2. `WP_PLUGIN_URL`：这是一个常量，用于定义插件的URL（用于在网页上访问插件文件）。以下是一个使用该常量的示例：
$plugin_url = WP_PLUGIN_URL . '/your-plugin-folder/';
同样，请将"your-plugin-folder"替换为您插件的实际文件夹名称。使用该常量，您可以获取插件在网页上的完整URL。
请注意，`WP_PLUGIN_DIR`和`WP_PLUGIN_URL`常量在WordPress版本2.6之后引入。从WordPress 5.5版本开始，这两个常量被标记为过时（deprecated），因为WordPress更倾向于使用新的插件文件结构。如果您正在开发新插件，建议使用新的插件文件结构和相关函数。
在新的插件文件结构中，可以使用以下函数来获取插件的目录路径和URL：
- `plugin_dir_path()`：获取插件目录路径。
- `plugin_dir_url()`：获取插件URL。
这些函数会自动将插件的版本、多站点和SSL等考虑因素纳入计算。
总结起来，使用`WP_PLUGIN_DIR`和`WP_PLUGIN_URL`常量定义插件的目录和URL的方法是：
$plugin_dir = WP_PLUGIN_DIR . '/your-plugin-folder/'; $plugin_url = WP_PLUGIN_URL . '/your-plugin-folder/';
但请注意，这两个常量已被标记为过时，建议使用新的插件文件结构和相关函数来获取插件的路径和URL。
使用PHP在WordPress中添加自定义功能可以通过以下方式实现：
下面是一个实操示例。
要在WordPress中添加自定义功能，可以按照以下步骤使用PHP编写并添加自定义功能：
// 添加自定义功能示例
// 1. 创建自定义短代码
function custom_shortcode() {
return '这是我的自定义短代码内容';
}
add_shortcode('custom', 'custom_shortcode');
// 2. 自定义小工具
function custom_widget() {
echo '这是我的自定义小工具内容';
}
register_widget('custom_widget');
// 3. 自定义菜单
function custom_menu() {
register_nav_menu('custom-menu', '自定义菜单');
}
add_action('after_setup_theme', 'custom_menu');
// 4. 自定义页面模板
function custom_page_template() {
/* Template Name: 自定义模板 */
// 自定义模板的内容和样式
}
请注意，修改主题文件可以在主题更新时丢失，因此建议在进行任何更改之前备份functions.php文件。此外，为避免不必要的错误和冲突，建议在添加自定义功能前先了解WordPress开发文档和最佳实践，以确保正确、安全地实现所需的自定义功能。
使用 do_action 函数可以触发一个钩子函数。do_action 函数的参数与要触发的钩子函数的参数相同。
例如，触发save_post钩子函数的代码如下：
do_action( 'save_post', $post_ID, $post );
这里，$post_ID 和 $post 是传递给钩子函数的参数。
使用 wp_get_current_user 获取当前登录用户的信息：
$current_user = wp_get_current_user(); // 获取当前用户的ID $user_id = $current_user->ID; // 获取当前用户的用户名 $user_login = $current_user->user_login; // 获取当前用户的邮箱 $user_email = $current_user->user_email; // 获取当前用户的显示名称 $display_name = $current_user->display_name;
